Winchester, Hampshire
Bungalow rear extension in Winchester
Single-storey rear extensions that keep everything on one level. If you live in Winchester and want to know what a bungalow rear extension would cost and whether it needs planning, start with the online guide price or a free site visit.
Winchester sits in Hampshire, with postcode districts including SO21, SO22 and SO23. For bungalows in Hampshire, a rear extension is the usual way to add space without adding stairs.
Book a free site visit
Tell us about the house and we'll call to arrange a free, no-obligation visit.
How much does a bungalow rear extension cost in Winchester?
For Winchester we work from the South East England rate: £2,070–£3,360 per square metre of new floor, including VAT, standard specification. South East prices run above our West Midlands baseline, mainly on labour rates and clay-soil foundations.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £25,000–£40,500 |
| 4 m wide × 6 m deep (24 m²) | £49,500–£80,500 |
Your written price follows a measured survey and an agreed design, so it reflects your house, not an average.
Do you need planning permission for a bungalow rear extension in Winchester?
The planning route for a bungalow rear extension in Winchester is set by England's householder rules and your council.
English permitted development (Class A) allows a single-storey rear extension of 3 metres on a terraced or semi-detached house and 4 metres on a detached one, measured from the original house, with a maximum height of 4 metres and eaves of no more than 3 metres within 2 metres of a boundary.
If 3 or 4 metres is not enough, England's prior approval route allows 6 metres on a terraced or semi-detached house and 8 metres on a detached house for a single-storey rear extension. Neighbours are consulted, the council decides within 42 days, and the fee is £249, rising to £310 from 8 December 2026.
Conservation areas, National Parks, National Landscapes and the Broads restrict permitted development, and listed buildings always need listed building consent. We check your house's planning history and any conservation area before drawing, so the route is clear before you spend on plans.
What are homes in Winchester like to extend?
Commuter semis and detached houses make up much of Winchester, and longer gardens make England's prior approval route for deeper rear extensions worth considering.
How a bungalow rear extension in Winchester comes together
Free site visit
We measure the house and garden, look at the back wall, drainage and boundaries, and talk through what you want from the space.
Drawings and budget
Floor plans and elevations for the options, each with a guide price.
Approvals
Permitted development check, prior approval or planning application, then Building Regulations drawings and structural calculations, plus party wall notices where they apply.
Fixed price and build
A written price for the agreed design, a start date and a named contact through the build, ending with the building control completion certificate.
Bungalow rear extensions near Winchester
From Winchester, the nearest places we also cover are Bishopstoke (6.8 miles) and Eastleigh (6.9 miles).
- Bungalow rear extension in Bishopstoke
- Bungalow rear extension in Eastleigh
- Bungalow rear extension in Fair Oak
- Bungalow rear extension in Romsey
- Bungalow rear extension in Portswood
Other work in Winchester:
FAQ
Bungalow rear extension questions in Winchester
Is the site visit in Winchester free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Do I need planning permission for a rear extension in Winchester?
Often not for a single-storey rear extension of up to 3 metres (4 metres on a detached house) under permitted development, or up to 6 or 8 metres with prior approval, unless the house is in a conservation area or its rights have been removed.
How deep can I extend?
The same limits as a house: 3 or 4 metres in England, more with prior approval.
How much does a bungalow rear extension cost in Winchester?
As a guide, £2,070–£3,360 per square metre including VAT for a standard specification. For example, 3 m wide × 4 m deep (12 m²): about £25,000–£40,500 at that rate. Your written price follows the survey.
Can I get a price without a visit?
Our online guide-price tool gives a range in a couple of minutes. A written price needs a survey.
Will I need a structural engineer?
Yes for the beam over the new opening and usually the foundations; we arrange them and their calculations go to building control.